CN1041618A - The method of melting copper and burner - Google Patents

Abstract

A kind of employing comprises that the various fuel of low-pressure gas and hydraulic pressure fuel provide basically and belongs to the burner that burns completely and the uniform flame composition is arranged; And a kind of method of using this class burner melting cathode in vertical blast furnace.

Description

The method of melting copper and burner

The present invention relates to such burner, it can adopt various fuel, comprises the gas and the liquid fuel of low pressure, provides to belong to burning completely and uniform flame composition basically; The invention still further relates to a kind of method of using said burner, it can be in vertical blast furnace melting cathode effectively and economically, and the unlikely excess of oxygen of in copper, introducing.

Needing the burner that can effectively heat with melting, is the vital problem of industrial sector, especially today energy cost go up, the energy reduces and can support under the situation that the fuel of utilization changing.The melting cathode is exactly the example that needs this class novel burner in the stove of vertical comburant (-rent), this kind burner can adopt the Sweet natural gas, Sweet natural gas, coke-oven gas, petroleum gas, producer gas of liquid fuel and blue water-gas, carburetted water gas, improvement and other natural with fuel synthetic coal gas and so on.Above-mentioned gas fuel is often directly taken from the town gas system of low pressure, and owing to do not allow often to use increasing apparatus, thereby the existing burner that is used for high-pressure gas can not reach the purpose of aforementioned applications effectively.

By known in this technology and 3,199, No. 977 United States Patent (USP)s (A.J.Phillips etc., 1965,8,10 announce) are discussed like that, cathode is produced with electrolysis process industrial, above-mentioned patent content has been listed this explanation in as a reference.This kind negative electrode is industrial fine copper, general about 1 inch thick and be planar rectangular about 25 inches to 40 inches, certainly also can be by bigger and littler specification production.

Although the copper of cathodic deposition, on actually existing in cathode surface or be mixed in wherein common impurity and the inevitable small amount of electrolyte (Sulfates), it is industrial fine copper, but because their shape and physical properties, particularly because the grain pattern of deposited copper does not generally use cathode itself.Make it to possess more useful form, just must melt this negative electrode, and this kind molten metal is cast into one or more work in-process shapes, the for example wire bar of piece, ingot, bar and so on, billet and rod, be cast into the shape that is similar to the finished product of producing thus, for example plate, silk, pipe, and be cast into many other commercially available prod of making by industrial pure copper.In addition, if this kind copper is polluted by unacceptable oxygen amount and sulfur content on the industrial production in fusion process, then most importantly need before this molten metal is cast, sulphur in this copper water and oxygen to be reduced to acceptable content with blowing and insert-young's method.But consider that from the commodity viewpoint copper that melts out like this is damaged basically and can not be used, and forms new negative electrode and must handle by series of steps again.This is a kind of expensive time-consuming way.

Therefore, most crucial is, being used for the burner of melting copper must not have for example deleterious oxygen to pollute copper.Generally, the mixture of fuel-oxygen (air) should be got such ratio, makes wherein contained hypoxgia so that fuel perfect combustion, and the fusing flame that forms is to reduce flame.Yet this fusing has but been proposed the requirement of following strictness with flame:, must avoid owing to existing unburned oxygen to cause undesirable oxidation effect in the flame although generally speaking flame is reductibility.Concerning most industrial application, this predetermined reductive condition should make any oxygen amount of infiltrating copper in fusion process be no more than the 0.05%(weight of copper amount).This predetermined reductive condition is preferably, and the oxygen amount in the copper water of entering is less than the 0.035%(weight of copper amount), and be preferably less than 0.01%.

The United States Patent (USP) of above-mentioned Phillips etc. and 4,536, the burner of being introduced in No. 152 United States Patent (USP)s (Little etc.) all is that specialized designs becomes the sort of burner form shown in Fig. 1, and the goods of the industrial pure copper of aforementioned the sort of uniform reduction flame and melting are provided.Disclosed content has been listed this explanation in as a reference in 4,536, No. 152 United States Patent (USP)s.

There is the burner body 3 in the technology to comprise mixing section 50 shown in Fig. 1 earlier, is used for fuel stream being flowed with oxygen containing gas (air) and becoming a resultant current, be used for simultaneously this resultant current is introduced flame stabilization section 51.This burner body also is provided with a burning zone 52, and this body is installed on the flange 53 of the shoulder 54 that abuts against flame stabilization section 51.Priming bar 58 can be arranged in the furnace throat, and the sparking plug 59 that the common the sort of electricity of the mix flow that is used for igniting triggers is the side of the section of being installed in 51 then, and the inner that makes this sparking plug is in abutting connection with excellent 58.This combination of furnace throat and rod 58 is specially in order to keep the burning of mix flow in burning zone 52, especially when speed fuel is high.Section 51 also is provided with opening 69 and 70 and uses for the mix flow sampling.

Section 50 has an annular manifold pipe part 60, cover 61, turn of bilge or ancon 62, orifice plate 63 and the vision slit 64 that is equipped with transparent eyepiece 65.Cover 61 forms a menifold near the left end of shoulder 66 with section 50 in conjunction with ring part 60, is used for making one (normally fuel stream) less in two strands of a fluid streams for the treatment of and closing to enter and close chamber 68 from pipeline 36 through opening 67; By to the size dimension of opening 67 and control the less a fluid stream of this strand around the selection of the distribution mode of above-mentioned cover periphery and enter situation in the above-mentioned chamber 68.Bigger that plume Shu Zecong pipeline 29 is introduced chamber 68 by the hole and the turn of bilge 62 of plate 63.Pipeline 36 imports burner body with less a fluid stream (fuel), and device has valve 39 simultaneously, is used for controlling the quantity combusted of being defeated by burner body with malleation.Pipeline 36 also is equipped with common the sort of diaphragm control valve 38, and pipe fitting 37 causes the space of this diaphragm valve septation top in the pipeline 29, so that the air pressure in the pipeline 29 is led to this barrier film.The standard operation pressure of fuel gas is gauge pressure 1.25～2 pounds/square inch (Psig) or higher.

During the operating burner body, intrafascicular bigger one of two plumes for the treatment of and close by a hole, entered the turn of bilge of guiding and close the chamber into, the accurate composition of this plume bundle is according to 3,199, and mode is measured described in No. 977 United States Patent (USP)s.

Unfortunately, when using low-pressure gas fuel and/or liquid fuel, the pipeline pressure of this class A fuel A is lower than the pressure that exists in the burner body, this just requires to reequip burner that technology is arranged earlier and special operational condition, then urgently wishes to make the novel burner design that is fit to adopt this class A fuel A in industry member.

The invention provides and a kind ofly be used for smelting metal and can not pollute the effective burner of height of this metal significantly, it can adopt the various fuel that comprise low pressure and pressurized fuel gas and liquid fuel.This burner is to 3,199, No. 977 and 4,536, a kind of improvement of No. 152 described burners of United States Patent (USP), adopt a kind of inhaling type mixing section to replace the pressure mixing section that has earlier in the technology burner simultaneously, this inhaling type mixing section allows to adopt pressure to be lower than the fuel of air pressure in the burner for example.For example, there is the technology burner will under the pressure that is higher than 12～15 inches hydraulic pressure of air pressure, work usually earlier.Utilize this inhaling type burner of the present invention, fuel pressure then can be lower than air pressure.

Another improvement is to be provided with one to plant the axially aligned eyepiece of burner mixing section therewith, and the latter can be contained in and be used for constituting in this burner mixing section in the displacement bar of suction hole.This eyepiece preferably has wide angle viewing object lens, so that the locular wall of this burner is carried out wide angle viewing.Better a kind of embodiment is to adopt the optical viewer of the mirror of looking in the distance, and the latter is advisable to be contained in the aforementioned displacements bar, divides so that focus on some part even the furnace interior of burner.

Fig. 1 is the longitudinal diagram that the amplification of technology burner system is arranged earlier.

Fig. 2 is the sectional view of inhaling type mixing section of the present invention's burner.

The elder generation that is shown in Fig. 1 and as above discussed is made up of with mass part by many sections the technology burner.This burner that has improved is to be substituted in mixing section of the present invention 71 shown in Figure 2 the mixing section 50 and turn of bilge 62 at Fig. 1 point A place or its contiguous place.Mixing section 71 can be threaded, flange or other mechanical seal mode be installed in an A place.37 of pipe fittings that lead to diaphragm control valve 38 among Fig. 1 preferably keep, and in a better embodiment, then available one similar pipe fitting is connected to mixing section 71 near the end of putting A.This pipe fitting can be connected with pipe fitting 37 with a T junction, valve 38 is provided pressure signal and the operation of burner is tightened control.

As shown in Figure 2, mixing section 71 comprises a mixing section 72, the optional displacement bar 73 that is provided with is arranged to constitute a looping pit 74 in the chamber.Two plumes for the treatment of and closing intrafascicular less one (normally fuel stream) are introduced at import 75 places, and bigger that plume bundle (normally airflow) is then introduced by import 76.Eyepiece 77 and 78 sets up separately at the two ends of displacement bar 73, and eyepiece 78 is wide-angle lens preferably, can observe the whole inside of igniting section 51 and combustion chamber 52.Even more ideal embodiment is to adopt the visual telescope section 79 be located in the displacement bar 73, in order to focusing on the specific part of burner 3, even the inside of stove.

When operating this kind burner, once adopted Sweet natural gas to act as a fuel, introduced through import 75, simultaneously by import 76 introducing airs.Mixing section 71 is inhaling type air-air and gas mixer (numbering 3065-6) that North America manufacturing company (Ohio, Cleveland city) produces, and is not with displacement bar.The size of burner then can be consulted in the brochure that title publishes for the said firm of " size 30.65,1-87 " 1～2 page.The pressure of 20 inch of water (W.C) that form through via hole 74 time is fallen, and above-mentioned inhaling type device per hour provides 1.1 * 10 with Sweet natural gas ⁶BTU(Btu) heat.The annulus area in above-mentioned hole is 1.290 square inches.The pressure of used Sweet natural gas is 0.28Psig, and the pressure of air is 0.87Psig.

When measuring fuel-air mixture at opening 69 and 70 places, mixture can show that the flame in the combustion chamber 52 is uniformly too uniformly, can carry out melting and unlikely unwanted oxygen amount is introduced in the material in the melting.This has obtained certainly when this burner being used in the industrial blast furnace melting cathode copper.In this cathode copper and the finished product typical oxygen level be respectively 0.01% with 0.02%(weight).

Should know under the prerequisite that does not break away from spirit of the present invention and scope, be to make many changes and improved to the several characteristics of having stated.Thereby top description just is used for the present invention is made an explanation rather than it is made restriction.

Claims (7)

1, a kind of method of melting copper in blast furnace, the flame that wherein adopts a burner to provide melting copper to use also comprises and adopts the part of a kind of inhaling type air-fuel mixing section as this burner.

2, the method for claim 1, burner wherein have an eyepiece that is located in its mixing section, this eyepiece vertically therewith the mixing section of burner aim at.

3, method as claimed in claim 2, eyepiece is wherein got the visual telescope form, can be through regulating the position of observing required observation in the burner.

4, a kind of burner that inhaling type air-fuel mixing section is arranged, wherein the eyepiece of adorning is positioned at and can passes through the position that this mixing chamber outlet is outwards observed.

5, burner as claimed in claim 4, eyepiece wherein is positioned on the axis of this burner mixing section.

6, burner as claimed in claim 5, eyepiece wherein are to be contained in this burner in the bar that is provided with along axis, and this bar is used for constituting an annular suction casing in burner.

7, burner as claimed in claim 6, eyepiece wherein are the parts of mounting of telescope, can be by regulating the different piece of observing this burner and stove inside.

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